

	var trimLeft = /^\s+/,
		trimRight = /\s+$/,
		mathRound = Math.round,
		mathMin = Math.min,
		mathMax = Math.max,
		mathRandom = Math.random;

	export function tinycolor(color, opts) {

		color = (color) ? color : '';
		opts = opts || {};

		// If input is already a tinycolor, return itself
		if (color instanceof tinycolor) {
			return color;
		}
		// If we are called as a function, call using new instead
		if (!(this instanceof tinycolor)) {
			return new tinycolor(color, opts);
		}

		var rgb = inputToRGB(color);
		this._originalInput = color,
			this._r = rgb.r,
			this._g = rgb.g,
			this._b = rgb.b,
			this._a = rgb.a,
			this._roundA = mathRound(100 * this._a) / 100,
			this._format = opts.format || rgb.format;
		this._gradientType = opts.gradientType;

		// Don't let the range of [0,255] come back in [0,1].
		// Potentially lose a little bit of precision here, but will fix issues where
		// .5 gets interpreted as half of the total, instead of half of 1
		// If it was supposed to be 128, this was already taken care of by `inputToRgb`
		if (this._r < 1) {
			this._r = mathRound(this._r);
		}
		if (this._g < 1) {
			this._g = mathRound(this._g);
		}
		if (this._b < 1) {
			this._b = mathRound(this._b);
		}

		this._ok = rgb.ok;
	}

	tinycolor.prototype = {
		isDark: function() {
			return this.getBrightness() < 128;
		},
		isLight: function() {
			return !this.isDark();
		},
		isValid: function() {
			return this._ok;
		},
		getOriginalInput: function() {
			return this._originalInput;
		},
		getFormat: function() {
			return this._format;
		},
		getAlpha: function() {
			return this._a;
		},
		getBrightness: function() {
			//http://www.w3.org/TR/AERT#color-contrast
			var rgb = this.toRgb();
			return (rgb.r * 299 + rgb.g * 587 + rgb.b * 114) / 1000;
		},
		getLuminance: function() {
			//http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef
			var rgb = this.toRgb();
			var RsRGB, GsRGB, BsRGB, R, G, B;
			RsRGB = rgb.r / 255;
			GsRGB = rgb.g / 255;
			BsRGB = rgb.b / 255;

			if (RsRGB <= 0.03928) {
				R = RsRGB / 12.92;
			} else {
				R = Math.pow(((RsRGB + 0.055) / 1.055), 2.4);
			}
			if (GsRGB <= 0.03928) {
				G = GsRGB / 12.92;
			} else {
				G = Math.pow(((GsRGB + 0.055) / 1.055), 2.4);
			}
			if (BsRGB <= 0.03928) {
				B = BsRGB / 12.92;
			} else {
				B = Math.pow(((BsRGB + 0.055) / 1.055), 2.4);
			}
			return (0.2126 * R) + (0.7152 * G) + (0.0722 * B);
		},
		setAlpha: function(value) {
			this._a = boundAlpha(value);
			this._roundA = mathRound(100 * this._a) / 100;
			return this;
		},
		toHsv: function() {
			var hsv = rgbToHsv(this._r, this._g, this._b);
			return {
				h: hsv.h * 360,
				s: hsv.s,
				v: hsv.v,
				a: this._a
			};
		},
		toHsvString: function() {
			var hsv = rgbToHsv(this._r, this._g, this._b);
			var h = mathRound(hsv.h * 360),
				s = mathRound(hsv.s * 100),
				v = mathRound(hsv.v * 100);
			return (this._a == 1) ?
				"hsv(" + h + ", " + s + "%, " + v + "%)" :
				"hsva(" + h + ", " + s + "%, " + v + "%, " + this._roundA + ")";
		},
		toHsl: function() {
			var hsl = rgbToHsl(this._r, this._g, this._b);
			return {
				h: hsl.h * 360,
				s: hsl.s,
				l: hsl.l,
				a: this._a
			};
		},
		toHslString: function() {
			var hsl = rgbToHsl(this._r, this._g, this._b);
			var h = mathRound(hsl.h * 360),
				s = mathRound(hsl.s * 100),
				l = mathRound(hsl.l * 100);
			return (this._a == 1) ?
				"hsl(" + h + ", " + s + "%, " + l + "%)" :
				"hsla(" + h + ", " + s + "%, " + l + "%, " + this._roundA + ")";
		},
		toHex: function(allow3Char) {
			return rgbToHex(this._r, this._g, this._b, allow3Char);
		},
		toHexString: function(allow3Char) {
			return '#' + this.toHex(allow3Char);
		},
		toHex8: function(allow4Char) {
			return rgbaToHex(this._r, this._g, this._b, this._a, allow4Char);
		},
		toHex8String: function(allow4Char) {
			return '#' + this.toHex8(allow4Char);
		},
		toRgb: function() {
			return {
				r: mathRound(this._r),
				g: mathRound(this._g),
				b: mathRound(this._b),
				a: this._a
			};
		},
		toRgbString: function() {
			return (this._a == 1) ?
				"rgb(" + mathRound(this._r) + ", " + mathRound(this._g) + ", " + mathRound(this._b) + ")" :
				"rgba(" + mathRound(this._r) + ", " + mathRound(this._g) + ", " + mathRound(this._b) +
				", " + this._roundA + ")";
		},
		toPercentageRgb: function() {
			return {
				r: mathRound(bound01(this._r, 255) * 100) + "%",
				g: mathRound(bound01(this._g, 255) * 100) + "%",
				b: mathRound(bound01(this._b, 255) * 100) + "%",
				a: this._a
			};
		},
		toPercentageRgbString: function() {
			return (this._a == 1) ?
				"rgb(" + mathRound(bound01(this._r, 255) * 100) + "%, " + mathRound(bound01(this._g, 255) *
					100) + "%, " + mathRound(bound01(this._b, 255) * 100) + "%)" :
				"rgba(" + mathRound(bound01(this._r, 255) * 100) + "%, " + mathRound(bound01(this._g, 255) *
					100) + "%, " + mathRound(bound01(this._b, 255) * 100) + "%, " + this._roundA + ")";
		},
		toName: function() {
			if (this._a === 0) {
				return "transparent";
			}

			if (this._a < 1) {
				return false;
			}

			return hexNames[rgbToHex(this._r, this._g, this._b, true)] || false;
		},
		toFilter: function(secondColor) {
			var hex8String = '#' + rgbaToArgbHex(this._r, this._g, this._b, this._a);
			var secondHex8String = hex8String;
			var gradientType = this._gradientType ? "GradientType = 1, " : "";

			if (secondColor) {
				var s = tinycolor(secondColor);
				secondHex8String = '#' + rgbaToArgbHex(s._r, s._g, s._b, s._a);
			}

			return "progid:DXImageTransform.Microsoft.gradient(" + gradientType + "startColorstr=" +
				hex8String + ",endColorstr=" + secondHex8String + ")";
		},
		toString: function(format) {
			var formatSet = !!format;
			format = format || this._format;

			var formattedString = false;
			var hasAlpha = this._a < 1 && this._a >= 0;
			var needsAlphaFormat = !formatSet && hasAlpha && (format === "hex" || format === "hex6" ||
				format === "hex3" || format === "hex4" || format === "hex8" || format === "name");

			if (needsAlphaFormat) {
				// Special case for "transparent", all other non-alpha formats
				// will return rgba when there is transparency.
				if (format === "name" && this._a === 0) {
					return this.toName();
				}
				return this.toRgbString();
			}
			if (format === "rgb") {
				formattedString = this.toRgbString();
			}
			if (format === "prgb") {
				formattedString = this.toPercentageRgbString();
			}
			if (format === "hex" || format === "hex6") {
				formattedString = this.toHexString();
			}
			if (format === "hex3") {
				formattedString = this.toHexString(true);
			}
			if (format === "hex4") {
				formattedString = this.toHex8String(true);
			}
			if (format === "hex8") {
				formattedString = this.toHex8String();
			}
			if (format === "name") {
				formattedString = this.toName();
			}
			if (format === "hsl") {
				formattedString = this.toHslString();
			}
			if (format === "hsv") {
				formattedString = this.toHsvString();
			}

			return formattedString || this.toHexString();
		},
		clone: function() {
			return tinycolor(this.toString());
		},

		_applyModification: function(fn, args) {
			var color = fn.apply(null, [this].concat([].slice.call(args)));
			this._r = color._r;
			this._g = color._g;
			this._b = color._b;
			this.setAlpha(color._a);
			return this;
		},
		lighten: function() {
			return this._applyModification(lighten, arguments);
		},
		brighten: function() {
			return this._applyModification(brighten, arguments);
		},
		darken: function() {
			return this._applyModification(darken, arguments);
		},
		desaturate: function() {
			return this._applyModification(desaturate, arguments);
		},
		saturate: function() {
			return this._applyModification(saturate, arguments);
		},
		greyscale: function() {
			return this._applyModification(greyscale, arguments);
		},
		spin: function() {
			return this._applyModification(spin, arguments);
		},

		_applyCombination: function(fn, args) {
			return fn.apply(null, [this].concat([].slice.call(args)));
		},
		analogous: function() {
			return this._applyCombination(analogous, arguments);
		},
		complement: function() {
			return this._applyCombination(complement, arguments);
		},
		monochromatic: function() {
			return this._applyCombination(monochromatic, arguments);
		},
		splitcomplement: function() {
			return this._applyCombination(splitcomplement, arguments);
		},
		triad: function() {
			return this._applyCombination(triad, arguments);
		},
		tetrad: function() {
			return this._applyCombination(tetrad, arguments);
		}
	};

	// If input is an object, force 1 into "1.0" to handle ratios properly
	// String input requires "1.0" as input, so 1 will be treated as 1
	tinycolor.fromRatio = function(color, opts) {
		if (typeof color == "object") {
			var newColor = {};
			for (var i in color) {
				if (color.hasOwnProperty(i)) {
					if (i === "a") {
						newColor[i] = color[i];
					} else {
						newColor[i] = convertToPercentage(color[i]);
					}
				}
			}
			color = newColor;
		}

		return tinycolor(color, opts);
	};

	// Given a string or object, convert that input to RGB
	// Possible string inputs:
	//
	//     "red"
	//     "#f00" or "f00"
	//     "#ff0000" or "ff0000"
	//     "#ff000000" or "ff000000"
	//     "rgb 255 0 0" or "rgb (255, 0, 0)"
	//     "rgb 1.0 0 0" or "rgb (1, 0, 0)"
	//     "rgba (255, 0, 0, 1)" or "rgba 255, 0, 0, 1"
	//     "rgba (1.0, 0, 0, 1)" or "rgba 1.0, 0, 0, 1"
	//     "hsl(0, 100%, 50%)" or "hsl 0 100% 50%"
	//     "hsla(0, 100%, 50%, 1)" or "hsla 0 100% 50%, 1"
	//     "hsv(0, 100%, 100%)" or "hsv 0 100% 100%"
	//
	function inputToRGB(color) {

		var rgb = {
			r: 0,
			g: 0,
			b: 0
		};
		var a = 1;
		var s = null;
		var v = null;
		var l = null;
		var ok = false;
		var format = false;

		if (typeof color == "string") {
			color = stringInputToObject(color);
		}

		if (typeof color == "object") {
			if (isValidCSSUnit(color.r) && isValidCSSUnit(color.g) && isValidCSSUnit(color.b)) {
				rgb = rgbToRgb(color.r, color.g, color.b);
				ok = true;
				format = String(color.r).substr(-1) === "%" ? "prgb" : "rgb";
			} else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.v)) {
				s = convertToPercentage(color.s);
				v = convertToPercentage(color.v);
				rgb = hsvToRgb(color.h, s, v);
				ok = true;
				format = "hsv";
			} else if (isValidCSSUnit(color.h) && isValidCSSUnit(color.s) && isValidCSSUnit(color.l)) {
				s = convertToPercentage(color.s);
				l = convertToPercentage(color.l);
				rgb = hslToRgb(color.h, s, l);
				ok = true;
				format = "hsl";
			}

			if (color.hasOwnProperty("a")) {
				a = color.a;
			}
		}

		a = boundAlpha(a);

		return {
			ok: ok,
			format: color.format || format,
			r: mathMin(255, mathMax(rgb.r, 0)),
			g: mathMin(255, mathMax(rgb.g, 0)),
			b: mathMin(255, mathMax(rgb.b, 0)),
			a: a
		};
	}


	// Conversion Functions
	// --------------------

	// `rgbToHsl`, `rgbToHsv`, `hslToRgb`, `hsvToRgb` modified from:
	// <http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript>

	// `rgbToRgb`
	// Handle bounds / percentage checking to conform to CSS color spec
	// <http://www.w3.org/TR/css3-color/>
	// *Assumes:* r, g, b in [0, 255] or [0, 1]
	// *Returns:* { r, g, b } in [0, 255]
	function rgbToRgb(r, g, b) {
		return {
			r: bound01(r, 255) * 255,
			g: bound01(g, 255) * 255,
			b: bound01(b, 255) * 255
		};
	}

	// `rgbToHsl`
	// Converts an RGB color value to HSL.
	// *Assumes:* r, g, and b are contained in [0, 255] or [0, 1]
	// *Returns:* { h, s, l } in [0,1]
	function rgbToHsl(r, g, b) {

		r = bound01(r, 255);
		g = bound01(g, 255);
		b = bound01(b, 255);

		var max = mathMax(r, g, b),
			min = mathMin(r, g, b);
		var h, s, l = (max + min) / 2;

		if (max == min) {
			h = s = 0; // achromatic
		} else {
			var d = max - min;
			s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
			switch (max) {
				case r:
					h = (g - b) / d + (g < b ? 6 : 0);
					break;
				case g:
					h = (b - r) / d + 2;
					break;
				case b:
					h = (r - g) / d + 4;
					break;
			}

			h /= 6;
		}

		return {
			h: h,
			s: s,
			l: l
		};
	}

	// `hslToRgb`
	// Converts an HSL color value to RGB.
	// *Assumes:* h is contained in [0, 1] or [0, 360] and s and l are contained [0, 1] or [0, 100]
	// *Returns:* { r, g, b } in the set [0, 255]
	function hslToRgb(h, s, l) {
		var r, g, b;

		h = bound01(h, 360);
		s = bound01(s, 100);
		l = bound01(l, 100);

		function hue2rgb(p, q, t) {
			if (t < 0) t += 1;
			if (t > 1) t -= 1;
			if (t < 1 / 6) return p + (q - p) * 6 * t;
			if (t < 1 / 2) return q;
			if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
			return p;
		}

		if (s === 0) {
			r = g = b = l; // achromatic
		} else {
			var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
			var p = 2 * l - q;
			r = hue2rgb(p, q, h + 1 / 3);
			g = hue2rgb(p, q, h);
			b = hue2rgb(p, q, h - 1 / 3);
		}

		return {
			r: r * 255,
			g: g * 255,
			b: b * 255
		};
	}

	// `rgbToHsv`
	// Converts an RGB color value to HSV
	// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]
	// *Returns:* { h, s, v } in [0,1]
	function rgbToHsv(r, g, b) {

		r = bound01(r, 255);
		g = bound01(g, 255);
		b = bound01(b, 255);

		var max = mathMax(r, g, b),
			min = mathMin(r, g, b);
		var h, s, v = max;

		var d = max - min;
		s = max === 0 ? 0 : d / max;

		if (max == min) {
			h = 0; // achromatic
		} else {
			switch (max) {
				case r:
					h = (g - b) / d + (g < b ? 6 : 0);
					break;
				case g:
					h = (b - r) / d + 2;
					break;
				case b:
					h = (r - g) / d + 4;
					break;
			}
			h /= 6;
		}
		return {
			h: h,
			s: s,
			v: v
		};
	}

	// `hsvToRgb`
	// Converts an HSV color value to RGB.
	// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]
	// *Returns:* { r, g, b } in the set [0, 255]
	function hsvToRgb(h, s, v) {

		h = bound01(h, 360) * 6;
		s = bound01(s, 100);
		v = bound01(v, 100);

		var i = Math.floor(h),
			f = h - i,
			p = v * (1 - s),
			q = v * (1 - f * s),
			t = v * (1 - (1 - f) * s),
			mod = i % 6,
			r = [v, q, p, p, t, v][mod],
			g = [t, v, v, q, p, p][mod],
			b = [p, p, t, v, v, q][mod];

		return {
			r: r * 255,
			g: g * 255,
			b: b * 255
		};
	}

	// `rgbToHex`
	// Converts an RGB color to hex
	// Assumes r, g, and b are contained in the set [0, 255]
	// Returns a 3 or 6 character hex
	function rgbToHex(r, g, b, allow3Char) {

		var hex = [
			pad2(mathRound(r).toString(16)),
			pad2(mathRound(g).toString(16)),
			pad2(mathRound(b).toString(16))
		];

		// Return a 3 character hex if possible
		if (allow3Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2]
			.charAt(0) == hex[2].charAt(1)) {
			return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0);
		}

		return hex.join("");
	}

	// `rgbaToHex`
	// Converts an RGBA color plus alpha transparency to hex
	// Assumes r, g, b are contained in the set [0, 255] and
	// a in [0, 1]. Returns a 4 or 8 character rgba hex
	function rgbaToHex(r, g, b, a, allow4Char) {

		var hex = [
			pad2(mathRound(r).toString(16)),
			pad2(mathRound(g).toString(16)),
			pad2(mathRound(b).toString(16)),
			pad2(convertDecimalToHex(a))
		];

		// Return a 4 character hex if possible
		if (allow4Char && hex[0].charAt(0) == hex[0].charAt(1) && hex[1].charAt(0) == hex[1].charAt(1) && hex[2]
			.charAt(0) == hex[2].charAt(1) && hex[3].charAt(0) == hex[3].charAt(1)) {
			return hex[0].charAt(0) + hex[1].charAt(0) + hex[2].charAt(0) + hex[3].charAt(0);
		}

		return hex.join("");
	}

	// `rgbaToArgbHex`
	// Converts an RGBA color to an ARGB Hex8 string
	// Rarely used, but required for "toFilter()"
	function rgbaToArgbHex(r, g, b, a) {

		var hex = [
			pad2(convertDecimalToHex(a)),
			pad2(mathRound(r).toString(16)),
			pad2(mathRound(g).toString(16)),
			pad2(mathRound(b).toString(16))
		];

		return hex.join("");
	}

	// `equals`
	// Can be called with any tinycolor input
	tinycolor.equals = function(color1, color2) {
		if (!color1 || !color2) {
			return false;
		}
		return tinycolor(color1).toRgbString() == tinycolor(color2).toRgbString();
	};

	tinycolor.random = function() {
		return tinycolor.fromRatio({
			r: mathRandom(),
			g: mathRandom(),
			b: mathRandom()
		});
	};


	// Modification Functions
	// ----------------------
	// Thanks to less.js for some of the basics here
	// <https://github.com/cloudhead/less.js/blob/master/lib/less/functions.js>

	function desaturate(color, amount) {
		amount = (amount === 0) ? 0 : (amount || 10);
		var hsl = tinycolor(color).toHsl();
		hsl.s -= amount / 100;
		hsl.s = clamp01(hsl.s);
		return tinycolor(hsl);
	}

	function saturate(color, amount) {
		amount = (amount === 0) ? 0 : (amount || 10);
		var hsl = tinycolor(color).toHsl();
		hsl.s += amount / 100;
		hsl.s = clamp01(hsl.s);
		return tinycolor(hsl);
	}

	function greyscale(color) {
		return tinycolor(color).desaturate(100);
	}

	function lighten(color, amount) {
		amount = (amount === 0) ? 0 : (amount || 10);
		var hsl = tinycolor(color).toHsl();
		hsl.l += amount / 100;
		hsl.l = clamp01(hsl.l);
		return tinycolor(hsl);
	}

	function brighten(color, amount) {
		amount = (amount === 0) ? 0 : (amount || 10);
		var rgb = tinycolor(color).toRgb();
		rgb.r = mathMax(0, mathMin(255, rgb.r - mathRound(255 * -(amount / 100))));
		rgb.g = mathMax(0, mathMin(255, rgb.g - mathRound(255 * -(amount / 100))));
		rgb.b = mathMax(0, mathMin(255, rgb.b - mathRound(255 * -(amount / 100))));
		return tinycolor(rgb);
	}

	function darken(color, amount) {
		amount = (amount === 0) ? 0 : (amount || 10);
		var hsl = tinycolor(color).toHsl();
		hsl.l -= amount / 100;
		hsl.l = clamp01(hsl.l);
		return tinycolor(hsl);
	}

	// Spin takes a positive or negative amount within [-360, 360] indicating the change of hue.
	// Values outside of this range will be wrapped into this range.
	function spin(color, amount) {
		var hsl = tinycolor(color).toHsl();
		var hue = (hsl.h + amount) % 360;
		hsl.h = hue < 0 ? 360 + hue : hue;
		return tinycolor(hsl);
	}

	// Combination Functions
	// ---------------------
	// Thanks to jQuery xColor for some of the ideas behind these
	// <https://github.com/infusion/jQuery-xcolor/blob/master/jquery.xcolor.js>

	function complement(color) {
		var hsl = tinycolor(color).toHsl();
		hsl.h = (hsl.h + 180) % 360;
		return tinycolor(hsl);
	}

	function triad(color) {
		var hsl = tinycolor(color).toHsl();
		var h = hsl.h;
		return [
			tinycolor(color),
			tinycolor({
				h: (h + 120) % 360,
				s: hsl.s,
				l: hsl.l
			}),
			tinycolor({
				h: (h + 240) % 360,
				s: hsl.s,
				l: hsl.l
			})
		];
	}

	function tetrad(color) {
		var hsl = tinycolor(color).toHsl();
		var h = hsl.h;
		return [
			tinycolor(color),
			tinycolor({
				h: (h + 90) % 360,
				s: hsl.s,
				l: hsl.l
			}),
			tinycolor({
				h: (h + 180) % 360,
				s: hsl.s,
				l: hsl.l
			}),
			tinycolor({
				h: (h + 270) % 360,
				s: hsl.s,
				l: hsl.l
			})
		];
	}

	function splitcomplement(color) {
		var hsl = tinycolor(color).toHsl();
		var h = hsl.h;
		return [
			tinycolor(color),
			tinycolor({
				h: (h + 72) % 360,
				s: hsl.s,
				l: hsl.l
			}),
			tinycolor({
				h: (h + 216) % 360,
				s: hsl.s,
				l: hsl.l
			})
		];
	}

	function analogous(color, results, slices) {
		results = results || 6;
		slices = slices || 30;

		var hsl = tinycolor(color).toHsl();
		var part = 360 / slices;
		var ret = [tinycolor(color)];

		for (hsl.h = ((hsl.h - (part * results >> 1)) + 720) % 360; --results;) {
			hsl.h = (hsl.h + part) % 360;
			ret.push(tinycolor(hsl));
		}
		return ret;
	}

	function monochromatic(color, results) {
		results = results || 6;
		var hsv = tinycolor(color).toHsv();
		var h = hsv.h,
			s = hsv.s,
			v = hsv.v;
		var ret = [];
		var modification = 1 / results;

		while (results--) {
			ret.push(tinycolor({
				h: h,
				s: s,
				v: v
			}));
			v = (v + modification) % 1;
		}

		return ret;
	}

	// Utility Functions
	// ---------------------

	tinycolor.mix = function(color1, color2, amount) {
		amount = (amount === 0) ? 0 : (amount || 50);

		var rgb1 = tinycolor(color1).toRgb();
		var rgb2 = tinycolor(color2).toRgb();

		var p = amount / 100;

		var rgba = {
			r: ((rgb2.r - rgb1.r) * p) + rgb1.r,
			g: ((rgb2.g - rgb1.g) * p) + rgb1.g,
			b: ((rgb2.b - rgb1.b) * p) + rgb1.b,
			a: ((rgb2.a - rgb1.a) * p) + rgb1.a
		};

		return tinycolor(rgba);
	};


	// Readability Functions
	// ---------------------
	// <http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef (WCAG Version 2)

	// `contrast`
	// Analyze the 2 colors and returns the color contrast defined by (WCAG Version 2)
	tinycolor.readability = function(color1, color2) {
		var c1 = tinycolor(color1);
		var c2 = tinycolor(color2);
		return (Math.max(c1.getLuminance(), c2.getLuminance()) + 0.05) / (Math.min(c1.getLuminance(), c2
			.getLuminance()) + 0.05);
	};

	// `isReadable`
	// Ensure that foreground and background color combinations meet WCAG2 guidelines.
	// The third argument is an optional Object.
	//      the 'level' property states 'AA' or 'AAA' - if missing or invalid, it defaults to 'AA';
	//      the 'size' property states 'large' or 'small' - if missing or invalid, it defaults to 'small'.
	// If the entire object is absent, isReadable defaults to {level:"AA",size:"small"}.

	// *Example*
	//    tinycolor.isReadable("#000", "#111") => false
	//    tinycolor.isReadable("#000", "#111",{level:"AA",size:"large"}) => false
	tinycolor.isReadable = function(color1, color2, wcag2) {
		var readability = tinycolor.readability(color1, color2);
		var wcag2Parms, out;

		out = false;

		wcag2Parms = validateWCAG2Parms(wcag2);
		switch (wcag2Parms.level + wcag2Parms.size) {
			case "AAsmall":
			case "AAAlarge":
				out = readability >= 4.5;
				break;
			case "AAlarge":
				out = readability >= 3;
				break;
			case "AAAsmall":
				out = readability >= 7;
				break;
		}
		return out;

	};

	// `mostReadable`
	// Given a base color and a list of possible foreground or background
	// colors for that base, returns the most readable color.
	// Optionally returns Black or White if the most readable color is unreadable.
	// *Example*
	//    tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:false}).toHexString(); // "#112255"
	//    tinycolor.mostReadable(tinycolor.mostReadable("#123", ["#124", "#125"],{includeFallbackColors:true}).toHexString();  // "#ffffff"
	//    tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"large"}).toHexString(); // "#faf3f3"
	//    tinycolor.mostReadable("#a8015a", ["#faf3f3"],{includeFallbackColors:true,level:"AAA",size:"small"}).toHexString(); // "#ffffff"
	tinycolor.mostReadable = function(baseColor, colorList, args) {
		var bestColor = null;
		var bestScore = 0;
		var readability;
		var includeFallbackColors, level, size;
		args = args || {};
		includeFallbackColors = args.includeFallbackColors;
		level = args.level;
		size = args.size;

		for (var i = 0; i < colorList.length; i++) {
			readability = tinycolor.readability(baseColor, colorList[i]);
			if (readability > bestScore) {
				bestScore = readability;
				bestColor = tinycolor(colorList[i]);
			}
		}

		if (tinycolor.isReadable(baseColor, bestColor, {
				"level": level,
				"size": size
			}) || !includeFallbackColors) {
			return bestColor;
		} else {
			args.includeFallbackColors = false;
			return tinycolor.mostReadable(baseColor, ["#fff", "#000"], args);
		}
	};


	// Big List of Colors
	// ------------------
	// <http://www.w3.org/TR/css3-color/#svg-color>
	var names = tinycolor.names = {
		aliceblue: "f0f8ff",
		antiquewhite: "faebd7",
		aqua: "0ff",
		aquamarine: "7fffd4",
		azure: "f0ffff",
		beige: "f5f5dc",
		bisque: "ffe4c4",
		black: "000",
		blanchedalmond: "ffebcd",
		blue: "00f",
		blueviolet: "8a2be2",
		brown: "a52a2a",
		burlywood: "deb887",
		burntsienna: "ea7e5d",
		cadetblue: "5f9ea0",
		chartreuse: "7fff00",
		chocolate: "d2691e",
		coral: "ff7f50",
		cornflowerblue: "6495ed",
		cornsilk: "fff8dc",
		crimson: "dc143c",
		cyan: "0ff",
		darkblue: "00008b",
		darkcyan: "008b8b",
		darkgoldenrod: "b8860b",
		darkgray: "a9a9a9",
		darkgreen: "006400",
		darkgrey: "a9a9a9",
		darkkhaki: "bdb76b",
		darkmagenta: "8b008b",
		darkolivegreen: "556b2f",
		darkorange: "ff8c00",
		darkorchid: "9932cc",
		darkred: "8b0000",
		darksalmon: "e9967a",
		darkseagreen: "8fbc8f",
		darkslateblue: "483d8b",
		darkslategray: "2f4f4f",
		darkslategrey: "2f4f4f",
		darkturquoise: "00ced1",
		darkviolet: "9400d3",
		deeppink: "ff1493",
		deepskyblue: "00bfff",
		dimgray: "696969",
		dimgrey: "696969",
		dodgerblue: "1e90ff",
		firebrick: "b22222",
		floralwhite: "fffaf0",
		forestgreen: "228b22",
		fuchsia: "f0f",
		gainsboro: "dcdcdc",
		ghostwhite: "f8f8ff",
		gold: "ffd700",
		goldenrod: "daa520",
		gray: "808080",
		green: "008000",
		greenyellow: "adff2f",
		grey: "808080",
		honeydew: "f0fff0",
		hotpink: "ff69b4",
		indianred: "cd5c5c",
		indigo: "4b0082",
		ivory: "fffff0",
		khaki: "f0e68c",
		lavender: "e6e6fa",
		lavenderblush: "fff0f5",
		lawngreen: "7cfc00",
		lemonchiffon: "fffacd",
		lightblue: "add8e6",
		lightcoral: "f08080",
		lightcyan: "e0ffff",
		lightgoldenrodyellow: "fafad2",
		lightgray: "d3d3d3",
		lightgreen: "90ee90",
		lightgrey: "d3d3d3",
		lightpink: "ffb6c1",
		lightsalmon: "ffa07a",
		lightseagreen: "20b2aa",
		lightskyblue: "87cefa",
		lightslategray: "789",
		lightslategrey: "789",
		lightsteelblue: "b0c4de",
		lightyellow: "ffffe0",
		lime: "0f0",
		limegreen: "32cd32",
		linen: "faf0e6",
		magenta: "f0f",
		maroon: "800000",
		mediumaquamarine: "66cdaa",
		mediumblue: "0000cd",
		mediumorchid: "ba55d3",
		mediumpurple: "9370db",
		mediumseagreen: "3cb371",
		mediumslateblue: "7b68ee",
		mediumspringgreen: "00fa9a",
		mediumturquoise: "48d1cc",
		mediumvioletred: "c71585",
		midnightblue: "191970",
		mintcream: "f5fffa",
		mistyrose: "ffe4e1",
		moccasin: "ffe4b5",
		navajowhite: "ffdead",
		navy: "000080",
		oldlace: "fdf5e6",
		olive: "808000",
		olivedrab: "6b8e23",
		orange: "ffa500",
		orangered: "ff4500",
		orchid: "da70d6",
		palegoldenrod: "eee8aa",
		palegreen: "98fb98",
		paleturquoise: "afeeee",
		palevioletred: "db7093",
		papayawhip: "ffefd5",
		peachpuff: "ffdab9",
		peru: "cd853f",
		pink: "ffc0cb",
		plum: "dda0dd",
		powderblue: "b0e0e6",
		purple: "800080",
		rebeccapurple: "663399",
		red: "f00",
		rosybrown: "bc8f8f",
		royalblue: "4169e1",
		saddlebrown: "8b4513",
		salmon: "fa8072",
		sandybrown: "f4a460",
		seagreen: "2e8b57",
		seashell: "fff5ee",
		sienna: "a0522d",
		silver: "c0c0c0",
		skyblue: "87ceeb",
		slateblue: "6a5acd",
		slategray: "708090",
		slategrey: "708090",
		snow: "fffafa",
		springgreen: "00ff7f",
		steelblue: "4682b4",
		tan: "d2b48c",
		teal: "008080",
		thistle: "d8bfd8",
		tomato: "ff6347",
		turquoise: "40e0d0",
		violet: "ee82ee",
		wheat: "f5deb3",
		white: "fff",
		whitesmoke: "f5f5f5",
		yellow: "ff0",
		yellowgreen: "9acd32"
	};

	// Make it easy to access colors via `hexNames[hex]`
	var hexNames = tinycolor.hexNames = flip(names);


	// Utilities
	// ---------

	// `{ 'name1': 'val1' }` becomes `{ 'val1': 'name1' }`
	function flip(o) {
		var flipped = {};
		for (var i in o) {
			if (o.hasOwnProperty(i)) {
				flipped[o[i]] = i;
			}
		}
		return flipped;
	}

	// Return a valid alpha value [0,1] with all invalid values being set to 1
	function boundAlpha(a) {
		a = parseFloat(a);

		if (isNaN(a) || a < 0 || a > 1) {
			a = 1;
		}

		return a;
	}

	// Take input from [0, n] and return it as [0, 1]
	function bound01(n, max) {
		if (isOnePointZero(n)) {
			n = "100%";
		}

		var processPercent = isPercentage(n);
		n = mathMin(max, mathMax(0, parseFloat(n)));

		// Automatically convert percentage into number
		if (processPercent) {
			n = parseInt(n * max, 10) / 100;
		}

		// Handle floating point rounding errors
		if ((Math.abs(n - max) < 0.000001)) {
			return 1;
		}

		// Convert into [0, 1] range if it isn't already
		return (n % max) / parseFloat(max);
	}

	// Force a number between 0 and 1
	function clamp01(val) {
		return mathMin(1, mathMax(0, val));
	}

	// Parse a base-16 hex value into a base-10 integer
	function parseIntFromHex(val) {
		return parseInt(val, 16);
	}

	// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
	// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
	function isOnePointZero(n) {
		return typeof n == "string" && n.indexOf('.') != -1 && parseFloat(n) === 1;
	}

	// Check to see if string passed in is a percentage
	function isPercentage(n) {
		return typeof n === "string" && n.indexOf('%') != -1;
	}

	// Force a hex value to have 2 characters
	function pad2(c) {
		return c.length == 1 ? '0' + c : '' + c;
	}

	// Replace a decimal with it's percentage value
	function convertToPercentage(n) {
		if (n <= 1) {
			n = (n * 100) + "%";
		}

		return n;
	}

	// Converts a decimal to a hex value
	function convertDecimalToHex(d) {
		return Math.round(parseFloat(d) * 255).toString(16);
	}
	// Converts a hex value to a decimal
	function convertHexToDecimal(h) {
		return (parseIntFromHex(h) / 255);
	}

	var matchers = (function() {

		// <http://www.w3.org/TR/css3-values/#integers>
		var CSS_INTEGER = "[-\\+]?\\d+%?";

		// <http://www.w3.org/TR/css3-values/#number-value>
		var CSS_NUMBER = "[-\\+]?\\d*\\.\\d+%?";

		// Allow positive/negative integer/number.  Don't capture the either/or, just the entire outcome.
		var CSS_UNIT = "(?:" + CSS_NUMBER + ")|(?:" + CSS_INTEGER + ")";

		// Actual matching.
		// Parentheses and commas are optional, but not required.
		// Whitespace can take the place of commas or opening paren
		var PERMISSIVE_MATCH3 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" +
			CSS_UNIT + ")\\s*\\)?";
		var PERMISSIVE_MATCH4 = "[\\s|\\(]+(" + CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")[,|\\s]+(" +
			CSS_UNIT + ")[,|\\s]+(" + CSS_UNIT + ")\\s*\\)?";

		return {
			CSS_UNIT: new RegExp(CSS_UNIT),
			rgb: new RegExp("rgb" + PERMISSIVE_MATCH3),
			rgba: new RegExp("rgba" + PERMISSIVE_MATCH4),
			hsl: new RegExp("hsl" + PERMISSIVE_MATCH3),
			hsla: new RegExp("hsla" + PERMISSIVE_MATCH4),
			hsv: new RegExp("hsv" + PERMISSIVE_MATCH3),
			hsva: new RegExp("hsva" + PERMISSIVE_MATCH4),
			hex3: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
			hex6: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/,
			hex4: /^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/,
			hex8: /^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/
		};
	})();

	// `isValidCSSUnit`
	// Take in a single string / number and check to see if it looks like a CSS unit
	// (see `matchers` above for definition).
	function isValidCSSUnit(color) {
		return !!matchers.CSS_UNIT.exec(color);
	}

	// `stringInputToObject`
	// Permissive string parsing.  Take in a number of formats, and output an object
	// based on detected format.  Returns `{ r, g, b }` or `{ h, s, l }` or `{ h, s, v}`
	function stringInputToObject(color) {

		color = color.replace(trimLeft, '').replace(trimRight, '').toLowerCase();
		var named = false;
		if (names[color]) {
			color = names[color];
			named = true;
		} else if (color == 'transparent') {
			return {
				r: 0,
				g: 0,
				b: 0,
				a: 0,
				format: "name"
			};
		}

		// Try to match string input using regular expressions.
		// Keep most of the number bounding out of this function - don't worry about [0,1] or [0,100] or [0,360]
		// Just return an object and let the conversion functions handle that.
		// This way the result will be the same whether the tinycolor is initialized with string or object.
		var match;
		if ((match = matchers.rgb.exec(color))) {
			return {
				r: match[1],
				g: match[2],
				b: match[3]
			};
		}
		if ((match = matchers.rgba.exec(color))) {
			return {
				r: match[1],
				g: match[2],
				b: match[3],
				a: match[4]
			};
		}
		if ((match = matchers.hsl.exec(color))) {
			return {
				h: match[1],
				s: match[2],
				l: match[3]
			};
		}
		if ((match = matchers.hsla.exec(color))) {
			return {
				h: match[1],
				s: match[2],
				l: match[3],
				a: match[4]
			};
		}
		if ((match = matchers.hsv.exec(color))) {
			return {
				h: match[1],
				s: match[2],
				v: match[3]
			};
		}
		if ((match = matchers.hsva.exec(color))) {
			return {
				h: match[1],
				s: match[2],
				v: match[3],
				a: match[4]
			};
		}
		if ((match = matchers.hex8.exec(color))) {
			return {
				r: parseIntFromHex(match[1]),
				g: parseIntFromHex(match[2]),
				b: parseIntFromHex(match[3]),
				a: convertHexToDecimal(match[4]),
				format: named ? "name" : "hex8"
			};
		}
		if ((match = matchers.hex6.exec(color))) {
			return {
				r: parseIntFromHex(match[1]),
				g: parseIntFromHex(match[2]),
				b: parseIntFromHex(match[3]),
				format: named ? "name" : "hex"
			};
		}
		if ((match = matchers.hex4.exec(color))) {
			return {
				r: parseIntFromHex(match[1] + '' + match[1]),
				g: parseIntFromHex(match[2] + '' + match[2]),
				b: parseIntFromHex(match[3] + '' + match[3]),
				a: convertHexToDecimal(match[4] + '' + match[4]),
				format: named ? "name" : "hex8"
			};
		}
		if ((match = matchers.hex3.exec(color))) {
			return {
				r: parseIntFromHex(match[1] + '' + match[1]),
				g: parseIntFromHex(match[2] + '' + match[2]),
				b: parseIntFromHex(match[3] + '' + match[3]),
				format: named ? "name" : "hex"
			};
		}

		return false;
	}

	function validateWCAG2Parms(parms) {
		// return valid WCAG2 parms for isReadable.
		// If input parms are invalid, return {"level":"AA", "size":"small"}
		var level, size;
		parms = parms || {
			"level": "AA",
			"size": "small"
		};
		level = (parms.level || "AA").toUpperCase();
		size = (parms.size || "small").toLowerCase();
		if (level !== "AA" && level !== "AAA") {
			level = "AA";
		}
		if (size !== "small" && size !== "large") {
			size = "small";
		}
		return {
			"level": level,
			"size": size
		};
	}

